Crusher.



No. 864,573. PATENTED AUG. 27, 1907. T. L, a; T. J. STURTEVANT.

CRUSHER. APPLICATION FILED APR. 29. 1907.

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No. 864,573. PATBNTED AUG. 27, 1907.

T. L. a T. J. STURTEVANT.

GR USHER. APPLIOATIOI nun 1'20, 1001.

6 SHEETS-SHEET 2.

wi /fly)" /W No. 864,573. 'PATENTED AUG. 27, 1907.

T. L. 6: T. J. STURTBVANT.

GRUSHER. rum-r1011 FILED APR. 29, 1907.

6 SHEETS-SHEET 3.

v To all whom it may concern:

UNITED STAT ESEATENT OFFICE.

THOMAS LEGGETT STURTEVANT, OF QUINCY, AND THOMAS JOSEPH STURTEVANT, OFWELLESLEY, MASSACHUSETTS, ASSIGNORS TO STURTEVANT MILL COMPANY, OFPORTLAND, MAINE, A CORPORATION OF MAINE.

CRUSHER.

Application filed April 29,

Specification of Letters Patent.

Patented Aug. 27, 1907.

1907- Serial No. 370,948.

Be it known that we, THOMAS Lnesn'r'r STURTEVANT and THOMAS JosnPHSTURTEVANT, citizens of the United States, residing, respectively, atQuincy and Wellesley, in the county of Norfolk and State ofMassachusetts, have invented or discovered certain new and usefulImprovements in Crushers, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to that class of vibrating jaw crushers theframes of which consist of relatively thin longitudinal steel plates towhich are bolted, at front and rear, suitable cross-beams; and theinvention has for its object to provide a crusher of this class whichwill be equal in capacity to two or more separate Crushers, but whichcan be made at less cost than the separate Crushers of equal capacity.Owing to the fact that these crushers frequently have to be transportedin mountainous countries and over difficult reads it is desirable thatthey should be of the least possible weight consistent with properstrength and stiffness, and it is also desirable that they should not bemade too large or ponderous, for the reason that, even if shipped insections or knocked-down condition, the parts would be too heavy forconvenient transportation. To increase the capacity of these crusherstherefore, without making them. so large as to require objectionablyponderous parts, the invention aims to provide such construction as willafford crushers of great efficiency and relatively large capacity forwork, without making the parts too large and heavy.

In crushers of the class to which this invention relates and in whichthe side-plates are of relatively thin steel plates, so as to afford thegreatest possible strength with a given weight of material, it isdesirable to provide such bearings for the driving or cam shafts as willafford steady and solid supports for said shafts; as otherwise thebearings might spring under severe strain of the side-plates. In thepresent improved crusher, which may be either of duplex or tripleconstruction, so as to have the capacity of two or three crusher-s ofthe same sized jaws, the bearings for the driving or cam shafts aresupported by a sectional rear cross-beam bolted to the side-plates andto an intermediate plate or plates, so as to afford a bearing orhearings in the cross-beam intermediate the end-bearings, and whichend-bearings preferably overhang the side-plates so as to afford largeendbearing surfaces for the cam shafts. I

In the accompanying drawings, Figure 1 is a longitudinal section, partlyin elevation, of the improved crusher. Figs. 2 and 3 are front and rearend views, respectively, of the same. Fig. 4 is a vertical transversesection of the same in the plane of the driving or cam I shaft, and Fig.5 is a view similar to Fig. 4 of a triple crusher constructed inaccordance with the invention. Fig. 6 is a transverse section, similarto Fig. 4, showing the rear cross beam in one piece.

Referring to the drawings, 12 denotes the longitudinal steel side-platesof the frame of the crusher, and 13 an intermediate or middle platesimilar in size and shape and extending parallel to the side-plates.Interposed between said side-plates and middle plate, at the front endof the machine, is a sectional head-block or front 1 cross-beam 14provided with suitable flanges 15 by which the parts of said sectionalbeam are bolted to said plates, said sectional block or beam beingpreferably apertured for the reception of tie-rods or bolts 16 extendingfrom one side-plate to the other. On the said sectional head-block orcross-beam are mounted the sta-. tionary crushing jaw-plates or jaws 17.Interposed between said side-plates and middle plate, at the rear of themachine, is a sectional cross-beam 18 the parts of which are providedwith flanges 19 by which they are bolted to the said side-plates andmiddle plate, said sectional rear cross-beam being also preferablyapertured for the reception of a tie rod or rods 20 extending from oneside plate to the other. The said sectional crossbeam 18 is providedwith inner and outer bearing parts 21 and 22 for the driving orcam-shaft 23 carrying the cams or eccentrics 24. "he outer bearings 22for the said shaft preferably overhang the side-plates 12, so as tooffer extended bearing surfaces while the inner bearing parts 21 arepreferably contiguous so as to afford a wide middle supporting bearingfor the said shaft; all of the said bearings being preferably providedwith. bearing sleeves, 25, as is common in this class of machines.

Resting against the cams or eccentrics 24 are rollers 26 mounted onrocking arms 27 for operating the vibrating jaws 28 carrying the movablejaw plates 29, said rocking arms and vibrating jaws having theirfulcrunis at their lower ends on suitable cross-shafts or hearing rods30 and 31 supported by the middle plate or plates 13 and removablymounted in the frame of the machine, and said arms and vibrating jawsbeing removably mounted on said shafts or rods, for convenientdismounting of the parts with a view to sectional transportation.Interposed between said rocking arms and vibrating jaws are thrustplates or toggles 32 seated in suitable bearing plates 33 on the saidarms and jaws. The vibrating crushing jaws 28 are retracted, and thebearing rolls 26 on the rocking arms 27 are held in contact with theiroperating cams or eccentrics 24 through the medium of springs 34encircling pull-back rods 35 connected at their forward ends to the saidvibrating jaws 28; said springs being interposed between the rearcross-beams 18 and suitable nuts or collars 36 on said rods.

if it be desired to still further increase the capacity of the crusherbeyond that of a duplex crusher, and without very greatly increasing theweight of any of the parts of the mill, the crusher-s may be madetriple, as indicated by the sectional view, Fig. 5, which shows twointermediate plates 13 and a three-section cross-beam 18; or they may bemade quadruplex, if desired, by adding other intermediate plates andcross-beam sections, as will be understood.

The stationary cross-shafts or bearing rods 30 and 31 are supported bythe middle plate or plates 13, as hereinbefore stated, and pass throughall of the plates 12 and 13. These stationary cross-shafts or bearingrods eX- tend outward beyond the outer sides of the side plates or sidepieces and are prevented from turning by clamp boxes each of whichcomprises a fixed part 37 having a flange 38, by which it is bolted tothe outside of one of the side-plates 12, and a clamping cap'39 securedto the part 37 by bolts 40. Thus the cross-shafts or bearing rodsencircled by the clamp boxes may be rigidly secured to the said sideplates without the use of keys, thus permitting the use of plain shaftsor rods requiring no machining.

The bearing or bearings for the driving or cam shaft, supported on theintermediate plate or plates 13, is an important feature of the presentinvention in that proper stiffness, under great stress, is thus affordedfor the said shaft; and 'while it is preferred to form the rearcross-beam in two or more sections it will be understood that, With theuse of the middle plate, the rear cross-beam might be in one part asshown in Fig. 6; the three-plate frame being an important feature of theinvention, with or Without a sectional or two-part rear crossbean1. Alsothe clamping boxes by which the stationary cross shafts or bearing rodsare secured to the side plates is a desirable feature of our inventionand is capable of use in crushers not embodying the other features ofthe invention herein described.

From the foregoing it will be understood that the present inventionprovides a crusher having the capacity of two or more crushers havingsimilar sized jaws, but which may be made at a less cost than theseparate Crushers; while most of the separate or individual parts of theimproved crusher need not be of greater weight than the similar parts ofa single crusher; so that a crushing mill of large capacity, built inaccordance with the present invention, can be shipped in sectional orknocked-down condition for convenient transportation over difficultroads, in that none of the parts need be objectionably ponderous orheavy. Another fact contributing to economy of construction of theimproved duplex crusher is that nearly all the part of the machine arethe same as similar parts of a single crusher, so that they can be madeby the same jigs and templets as are used in making single crushers; andthus nearly the whole of a duplex crusher can be built by an assemblageof parts of two single crushers as heretofore constructed.

Having thus described our invention we claim and desire to secure byLetters Patent:

1. A crushing machine the frame of which comprises two longitudinal sideplates, a parallel intermediate plate, and front and rear cross-beamsseparate from but secured to said plates, combined with a cam shafthaving its bearings in said rear crossbeam.

2. A crushing machine the frame of which comprises two longitudinal sideplates, :1 parallel intermediate plate, and sectional front and rearcross-beams separate from but secured to said plates, combined with acam shaft having its bearings in said rear crossbeam.

A crushing machine the frame of which comprises two longitudinal sideplates, a parallel intermediate plate, and front and rear cross-beamsseparate from but secured to said plates, combined with a driving or camshaft having end bearings and an intermediate bearing in the said rearcross-beam, said intermediate bearing being steadied on saidintermediate plate.

4. A crushing machine the frame of which comprises two longitudinal sideplates, a parallel intermediate plate, and sectional front and rearcrossbeams separate from but secured to said plates, combined with adriving or cam shaft having end bearings and an intermediate bearing inthe said rear cross-beam, said intermediate bearing being steadied onsaid intermediate plate.

In a crushing machine the frame of which comprises two longitudinal sideplates, a parallel intermediate plate,

and front and rear cross-beams separate from but secured to said plates,combined with a driving or cam shaft having end bearings and anintermediate bearing in the said rear cross-beam, said intermediatebearing being steadied on said intermediate plate, and vibrating jawsand rocking arms operated from said shaft and removably mounted on saidthree-plate frame.

6. A crushing machine the frame of which comprises two longitudinal sideplates, a parallel intermediate plate, and sectional front and rearcrossbeams separate from but secured to said plates, combined with adriving or cam shaft having end bearings and an intermediate bearing inthe said rear cross-beam, said intermediate bearing being steadied onsaid intermediate plate, and vibrating jaws and rockiig arms operatedfrom said shaft and removably mounted on said three-plate frame.

7. A vibrating crushing machine the frame of which comprises sideplates, one or more intermediate plates, and front and rear cross beamsformed separate from but secured to said plates, combined with a camshaft having end bearings and one or more intermediate hearings in saidrear cross beam, and vibrating jaws operated from said cam shaft.

8. A vibrating crushing machine the frame of which comprises sideplates, one or more inter-mediate plates, and sectional front and rearcross beams formed separate from but secured to said plates, combinedwith a cam shaft having end bearings and one or more intermediatebearings in said rear cross-beam, and vibrating jaws operated from saidcam-shaft.

5). A rocking jaw crusher comprising the combination with relativelythin side plates and one or more intermediate plates, of front and rearcross-beams interposed between and secured to said plates, a cam shafthaving end bearings and one or more intermediate bearings in said rearcross beam, stationary and vibrating jaw plates, and means for operatingsaid vibrating jaw plates from said shaft.

10, A rocking jaw crusher comprising the with relatively thin sideplates and one or mediate plates, of sectional front and rearcross-beams interposed between and secured to said plates, a cam shafthaving end bearings and one or more intermediate hearings in said rearcross beam, stationary and vibrating jaw plates, and means for operatingsaid vibrating jaw plates from said shaft.

11. In a crushing machine, the combination with a frame comprisingrelatively thin side-plates, an inter mediate plate or plates and frontand rear cross beams formed separate from but rigidly attached to saidplates, of a driving or cam shaft having end bearings and anintermediate bearing or hearings in said rear cross-beam, stationary jawplates mounted on said front cross-beam, vibrating jaws pivoted at theirlower ends and carrying movable jaw plates cooperating with saidstationary jaw plates, and means for operating said vibrating jaws fromsaid shaft.

combination more inter- 12. in a crushing machine, the combination witha frame comprising relatively thin side-plates, an intermediate plate orplates and sectional front and rear cross beams formed separate from butrigidly attached to said plates, of a driving or cam shaft having endbearings and an intermediate bearing or hearings in said rearcrossbeams, stationary jaw plates mounted on said front crossbeam,vibrating jaws pivoted at their lower ends and carrying movable jawplates cooperating with said stationary jaw plates, and means foroperating said vibrating jaws from said shaft.

13. In a crushing machine, the combination. with a frame comprisingrelatively thin side-plates, an intermediate plate or plates and frontand rear cross-beams formed separate from but rigidly attached to saidplates, of a driving or cam shaft having end bearings and anintermediate hearing or hearings in said rear cross-beam, stationary jawplates mounted on said front cross-beam, vibrating jaws pivoted at theirlower ends and carrying jaw plates cooperating with said stationaryjaw-plates, and means for operating said vibrating jaws from said shaft,said means comprising cams or eccentrics on said shaft, rocking armsprovided with rollers engaging said cams or eccentrics, thrust-plates ort ggles interposed between said rocking arms and said vibrating jaws,and springs, connected with said vibrating jaws, for retracting thelatter and for holding said rollers in contact with said cams oreccentrics.

14. In a crushing machine, the combination with a frame comprisingrelatively thin side-plates, an intermediate plate or plates andsectional front and rear crossbeams formed separate from but rigidlyattached to said plates, of a driving or cam shaft having end bearingsand an intermediate hearing or hearings in said rear crossbeam,stationary jaw plates mounted on said front cr0ssbeam, vibrating jawspivoted attheir lower ends and carrying jaw plates cooperating with saidstationary jawplates, and means for operating said vibrating jaws fromsaid shaft, said means comprising cams or eccentrics on said shaft,rocking arms provided with rollers engaging said cams or eccentrics,thrust-plates or toggles interposed between said rocking arms and saidvibrating jaws, and springs, connected with said vibrating jaws, forretracting the latter and for holding said rollers in contact with saidcams or eccentrics.

15. A duplex crushing machine the frame of which comprises side plates,:1 middle plate and front and rear crossbeams, combined with a drivingor cam shaft having three bearings, a plurality of vibrating jaws and aplurality of rocking arms for operating said jaws, said parts being alldetachably mounted or secured to provide a sectional crusher of largecapacity capable ofbeing shipped in knock-down condition, with its sideplates and middle plate separated.

16. A duplex crushing machine the frame of which C0111 prises sideplates, a middle plate and sectional front and rear cross-beams,combined with a driving or cam shaft having three bearings, a pluralityof vibrating jaws and a plurality of rocking arms for operating saidjaws, said parts being all detachably mounted or secured to provide asectional crusher of large capacity capable of being shipped inknock-down condition, with its side plates and middle plate separated.

17. In a crushing machine, the combination with the side pieces thereof,of one or more stationary cross-shafts or hearing rods extending throughthe side pieces of the crusher, and clamping boxes on the outside ofsaid side pieces for holding said shafts or rods stationary, each ofsaid clamping boxes comprising a fixed part bolted to a side piece and aclamping cap bolted to said fixed part.

In testimony whereof We aflix our signatures, in pres ence of twowitnesses.

THOMAS LEGGETT STURTEX ANL. THOMAS JOSEPH STURTEVANJF.

Witnesses W. F. ELLIS, L. H. STUR'JEVANT.

